Improvement in eyeglasses



S. D. BU R BAN K.

Eye-Glass.

NO. 2 Patented April 13, 1875.

t lNVENhJR I I fimwufffwl ifrrnn STATES SAMUEL D. BURBANK, OFSPRINGFIELD, MASSACHUSETTS.

IMPROVEMENT IN EYEGLASSES.

Specification forming part of Letters Patent No. [62,026, dated April13, 1875; application filed April 9, 1875. v

To all whom it may concern:

Be it known that I, SAMUEL D. BURBANK, of Springfield, in the county ofHampden and State of Massachusetts, have invented an [inprovement inEyeglasses, of which the following is a specification:

The object of my invention is to hinge the adjustable nosepieoe of aneyeglass and limit the motion to the vibration in a single plane, aswill be more fully explained hereafter.

In the accompanying drawings, Figure is a front view of an eyeglass withmy improvement. Fig. 2 is a side view of the nose-piece detached. Fig. 8is a face view of the same.

My invention or improvement in eyeglasses consists ofa pivotednose-piece, which vibrates in a single plane nearly corresponding withthe general plane of the glasses.

1n the manufacture of my improved eyeglasses the frame A and the springB may be of any ordinary construction, and the nose-' long as the motionis substantially the same, and limited to the same general plane of theglasses.

This pivot-motion of the adjustable nosepiece 0 is different from thatof a ball-andsocket or universal joint. 7

The pivot and other'devices of this construction are cheaper than thoseof the universal joint. Also, my eyeglass is more readily adjusted uponthe nose, and less liable to fall or get out of position, especiallywhen the person is moving or riding.

This nose-piece may be riveted in place; but I do not like thisconstruction, even when the nose-piece is riveted to thedownwardprojecting end of the spring, and th us deriving someadjnstability. But I propose to use any suitable fastening so long asthe nosepiece vibrates or moves only in a single plane, substantially asset forth.

Having described my invention, I claim- The self-adjusting nosepieee U,pivoted at or hear its center, or vibrating in a single plane,substantially in the manner and for the purposes set forth.

SAMUEL D. BURBANK.

Witnesses:

GInEoN WELLS, IMOGEN A. COOPER.

